[Bug target/92518] [10 regression] ppc rounding tests fail after r278207

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92518

--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It is still okay in ppc-round.c.048t.local-fnsummary2 but it is wrong
in ppc-round.c.088t.fixup_cfg3 (the pass immediately after it, at -O2).